Single Best Answer & standardised testing
Single Best Answer exams, done properly
Any tool can ask a multiple-choice question. Synap runs rigorous SBA and standardised testing — proper item structure, real question statistics, provider-accurate mocks and secure delivery. Far beyond a quiz builder.
- KR-20 & item analysis
- Provider-accurate mocks
- Rigorous & secure
A 58-year-old man presents with two hours of central chest pain radiating to the jaw, with sweating and nausea. He has a history of hypertension and smokes 20 cigarettes a day.
What is the single most appropriate initial investigation?
- A
Chest X-ray
- ✓
12-lead ECG
Correct — an ECG within 10 minutes is the priority in suspected ACS.
- C
Transthoracic echocardiogram
- D
Coronary angiography
- E
Serum troponin alone
Option-level feedback on every choice
Item statistics
0.62
P-value
0.41
Discrimination (Rpb)
214
Responses
Trusted by professional organisations, awarding bodies, and universities worldwide
What standardised testing demands
More than multiple choice
A Single Best Answer question isn’t just a multiple-choice question. It sets a realistic scenario (the stem), asks one focused question (the lead-in), and offers several plausible options — where one is the single best answer, not simply the only correct one.
Standardised testing means every candidate sits a comparable, defensible exam, and every item earns its place through statistical evidence. That takes far more than a quiz builder — it takes a purpose-built assessment platform.
A generic quiz builder
- ✕ One question field — no stem or lead-in structure
- ✕ Right/wrong scoring, no item statistics
- ✕ A quiz interface, not a real exam experience
Purpose-built for standardised testing
- Separated stem and lead-in, with option-level feedback
- P-value and discrimination (point-biserial) on every item
- Provider-accurate mocks, secured and delivered at scale
Why quiz builders fall short
Multiple choice is easy. Standardised testing isn’t.
The consumer quiz tools that “support MCQs” miss what actually makes standardised testing work.
No psychometric evidence
Without p-value and discrimination (point-biserial) data you can’t tell which items are working — or quietly undermining your exam.
No realistic exam experience
Candidates practise in a generic quiz UI that looks nothing like the real exam they’re preparing for.
Treated as a quiz, not an exam
Consumer tools lack the proctoring, lockdown and reliability that high-stakes standardised testing demands.
Proper SBA structure
Questions built the way examiners write them
Synap models SBAs the way assessment professionals actually author them — a separated stem and lead-in, plausible distractors, and a single best answer. Add feedback at the level of each individual option, so every choice teaches.
And SBA is just the start: run extended matching, multiple-response, media-rich and other closed formats from the same item bank.
Explore authoring & question typesSeparated stem & lead-in
Author the scenario and the question as distinct, reusable fields.
Option-level feedback
Attach feedback to each option — not just a single right/wrong note.
SBA & closed formats
Single best answer, extended matching, multiple response and more.
Media-rich stems
Embed images, audio and video in the scenario where realism demands it.
Psychometrics & analytics
Statistical evidence, item to exam
Every question carries the statistics assessment teams rely on: item difficulty (chance-corrected P-value), discrimination computed as a point-biserial (Rpb) correlation, and full distractor analysis showing exactly how each option performed.
At exam level, see the whole-test reliability reported as KR-20, a score distribution against the pass mark, grade and outcome breakdowns, and performance broken down by subject, topic, skill and difficulty. This is the difference between a quiz and a defensible standardised exam.
Item difficulty (P-value)
How hard each item proved, chance-corrected for guessing.
Discrimination (Rpb)
Whether an item separates stronger candidates from weaker ones.
KR-20 exam reliability
A recognised measure of how consistently your exam measures.
Breakdowns by tag & grade
Performance by subject, topic, skill, difficulty and grade band.
Score distribution
55%
Average score
39%
Pass rate
295
Candidates
Response distribution
- A9%
- ✓62%
- C14%
- D8%
- E7%
0.62
P-value
0.41
Discrimination (Rpb)
214
Responses
Realistic mocks & revision
Practice that feels like the real exam
We build custom, provider-accurate exam interfaces that emulate the real testing experience candidates will face — so a mock feels like the real thing, not a generic quiz.
And it goes well beyond mocks: question banks, timed practice, Spaced Learning and mastery tracking give candidates a complete preparation pathway on the same platform.
Explore exam prep, revision & mocksProvider-accurate exam UI
Bespoke interfaces we build to mirror the real exam candidates are sitting.
Timed mock exams
Full mocks under real conditions, timing and rules.
Question banks
Large, well-structured banks for practice and delivery alike.
Spaced Learning & mastery
Adaptive revision that tracks each candidate to mastery.
Rigorous & secure
Exams you can defend
High-stakes standardised testing has to hold up to scrutiny. Synap combines online and in-person proctoring, lockdown and randomised delivery with infrastructure that stays online when thousands of candidates start at once.
The result: comparable, defensible exams your candidates — and their regulators — can trust.
Explore assessment securityProctoring & lockdown
Online and in-person invigilation with a locked-down environment.
Randomised delivery
Question and option shuffling to protect exam integrity.
High-concurrency scale
Thousands of candidates starting at the same moment.
99.9% uptime SLA
Resilient infrastructure for exam day when it matters most.
Who runs standardised testing on Synap
Trusted for high-stakes SBA testing
From medical licensing to selective entry and professional qualification, teams rely on Synap for standardised, SBA-based assessment.
Medical & licensing
Leading USMLE preparation and mock providers run statistically-analysed question banks and realistic mocks on Synap.
Admissions & selective entry
11+ and entrance-exam providers deliver standardised, comparable tests to large candidate cohorts.
Legal & professional
The University of Law, a leading UK provider of legal education, prepares candidates for standardised assessment including the SQE.
See it in action
Run standardised testing the way it should be run
Book a tailored demo and we’ll show you proper SBA structure, live item statistics and provider-accurate mocks on Synap.
Goes further with the platform
The rest of the assessment lifecycle
Standardised testing is one part of Synap. Combine it with the rest of the platform.
Exam prep, revision & mocks
Question banks, spaced revision and realistic mocks.
Explore exam prepAssessment security
Proctoring, lockdown and reliable exam-day infrastructure.
View securityAuthoring & question types
Build SBAs and 16+ question types with rich media.
View authoringHigh-stakes exams
Everything you need for exams that really count.
View high-stakes exams
What our customers say
Synap came to our rescue when we needed a platform for computer-based testing, with a short turnaround time. Readily customizable, easy to use. We are very impressed with Synap and hope to continue working with them for our annual testing needs.
Chair | AAO
The features we like most about Synap are the spaced learning, mock exams, and the customer support we receive by the Synap team! When we want to make changes, they are always there to help us through the process.
Driver Operations Executive | FreeNow
The platform structure (library items placed into collections) makes multiple course variations very easy, saving significant amounts of time. Easily the best learning platform I have worked with or interacted with as a student.
Data & Automation | Frasers
FAQs
Standardised testing questions, answered
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Standardised testing, without the compromises
See how leading testing providers run rigorous SBA and standardised exams on Synap.
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